Ripping tool supported scoop for excavator

ABSTRACT

An excavator having a ripping tool secured thereto and a scoop detachably secured to and supported by the ripping tool, thereby avoiding the need to remove the ripping tool from the excavator when scoop operation is required.

United States Patent Luck 1 1 July 11, 1972 [541 RIPPING TOOL SUPPORTED SCOOP FOR EXCAVATOR [72] Inventor: Dieter G. Luck, Johannesburg, Republic of South Africa Orensteln and Koppel Llmlted, Johannesburg. Republic 01' South Africa 22 Filed: June 25,1910

2| App1.No.: 49.856

[73] Assignee:

[30] Foreign Application Priorlty Data July 2. 1969 South Africa ..69l4699 [52] US. CL ..37/117.5, 172/250. 214/1 E, 2l4/DIG. 5

[51] lnLCI. .1502! 3/76 [58] Fieldolsearch ..37/l 17.5.D1G. 3; 172/438. 172/245. 249-253. 777. 778; 214/1 E. D10. 5

[56] References Cited UNITED STATES PATENTS 3.061.123 10/1962 Rogers ..3'UD1G. 3

900.413 10/ 1908 McFaul ..172/251 3.039.210 6/1962 Slaughter ..37/117.5 2.8 30.392 4/1958 Blomquist ..37/1 17.5 2.817.168 12/1957 Mullin ....172/777 2. 674.818 4/1954 Cames .......172/777 2.935.802 5/1960 Wolfe et a1 1 72/247 X FOREIGN PATENTS OR APPLICATIONS 1.488.457 6/1967 France 37/l17.$

Primary Examiner1lobert E. Pulfrey Assistant Examiner-Clifford D. Crowder Arromey-Watson, Cole. Grindle 8: Watson ABSTRACT An excavator having a ripping tool secured thereto and a scoop detachably secured to and supported by the ripping tool, thereby avoiding the need to remove the ripping tool from the excavator when scoop operation is required.

RIPPING TOOL SUPPORTED SCOOP FOR EXCAVATOR This invention relates to hydraulic excavators which are widely used for loosening and moving earth and rock in excavating operations.

Hydraulic excavators generally have operating tools which are interchangeable. these tools generally being a ripper for loosening rock and soil and a bucket for scooping the loosened soil or rock out of the operating area. Thus if one excavator is used the tools must be interchanged periodically and this process has been found to consume an appreciable amount of time in practice thus prolonging the time taken to complete any specific excavation.

It is the object of this invention to provide means whereby the time taken to interchange such earth working tools on an excavator is appreciably lessened.

In accordance with this invention there is provided an hydraulic excavator ripper having a scoop detachably secured thereto in front of the ripper.

Further features of the invention provide for the scoop to have an arcuate channel-shaped mounting therefor adapted to receive the ripper and for the flanges of the channel to be provided with built-up recesses of substantially semicircular shape located to engage and provide a bearing surface against the pivotal mounting of the ripper and holes through the flanges adapted to receive a locating pin which in use passes through the ripper body.

Still further features of the invention provide for the scoop to be in the form of a share provided with inclined sidewalls or in the form of a bucket.

The invention also provides a scoop adapted to be releasably secured to the ripper of an hydraulic excavator.

A preferred form of this invention will be described with reference to the accompanying drawings wherein:

Fig. l is a side elevational view of the ripping tool with detachable scoop in position thereon; and Fig. 2 is a rear elevational view of the device shown in Fig. l. The drawings are not to be considered as limitating the scope of the invention As shown in both FIGS. l and 2. a scoop l is provided for use on an hydraulic excavator having a ripping tool 2 which is conventionally supported by means of a pivot mounting 3 on the excavator through the dipper arm. The pivot mounting 3 consists essentially of a pivot pin passing through the ends of the excavator dipper arm (unreferenced) and through the ripper body 2 and bush 4 extending outwardly on each side of the ripper body 2.

The scoop l in this example is in the form of a rounded share 6 having a hip plate 7 which has a slightly tapered undersurface 8. The outer sides of the share 6 are provided with outwardly inclined sidewalls 9 to retain earth and rock scooped onto the share.

The rear surface 10 of the share is provided with a pair of spaced parallel plates 1 l secured to project rearwardly at right angles thereto and extending around the rear surface 10 of the share. These plates 11 together with the portion of the share 10 between them form a channel 12 dimensioned to receive the ripping tool 2 of the excavator.

The ends of the plates 1 l remote from the lip plate 7 of the share are provided with arcuate builtup recesses 13 adapted to receive the lower rounded portion of bush 4 of the pivot mounting 3 of the excavator and the plates 11 are also provided with openings 14 therein which are at a distance from the recesses 13 and are adapted to receive a pin 15 which in use will pass though a corresponding opening l6 though the ripper body 5. This pin 15 is for retaining the scoop 1 only and is not subjected to working loads. This enables it to be a loose fit in the plates 1 l and ripper 2.

The side walls of the scoop carry stiffening ribs and the lowest rib has a supporting surface 17 against which the tooth 18 of the ripper is adapted to engage. Such engagement is therefore at a location near the lip plate 7.

A hook member 19 is provided which has a self-wedging action to lock the pin l5 against inadvertent retraction.

When the scoop l is required for use in the excavator, the

ripper 2 is not removed therefrom but the scoop l is located over the ripper 2 with the latter in the channel 12 between the plates 1 l.

The recesses 13 in the plates 11 are then engaged against the underside of bush 4 of the pivot mounting 3 of the excavator and pin 15 is passed through the openings 14 in the plates 11 and a corresponding opening 16 provided in the ripper body 5. lt will be understood that while the pin 15 is in position the scoop 1 will be unable to move to any appreciable extent relative to the ripper 2 and the scoop may then be used in the usual manner.

it will be further understood therefore that considerable time will be saved in interchanging tools since the ripper 2 is not actually removed from the excavator but is specifically used as a mounting for the scoop 1. Also, the pin 15 which locates the scoop l on the ripper 2 as above described is a reasonably loose fit thus facilitating removal of the scoop i when the ripper 2 is required for use once again.

It will be appreciated that during use the load on the scoop l is taken up between the supporting surface 17 on rib and the built-up recesses 13 thus providing a robust construction without applying working loading to the locating pin 15.

It will be therefore appreciated that the invention provides a useful tool for use as an hydraulic excavator which will give rise to an appreciable saving of time taken for interchanging tools.

What I claim as new and desire to secure by Letters Patent 1. An excavator including a dipper arm, a ripping tool pivotally mounted on said dipper arm about a pivot mounting extending transversely with respect thereto, a scoop detachably secured on opposite sides of said pivot mounting and fixedly retained on the front surface of said ripping tool, a portion of said front surface being in supporting engagement with said scoop whereby said scoop is supported by said front surface portion and said pivot mounting for pivotal movement with said ripping tool.

2. The excavator according to claim 1 wherein said scoop is provided with spaced plates extending rearwardly therefrom to thereby define a channel for the reception of said ripping tool.

3. The excavator according to claim 1 wherein said pivot mounting comprises a pivot pin, and wherein said pin is surrounded by spaced bushings with said scoop being detachably secured to said bushings.

4. The excavator according to claim 2 wherein said plates each have an opening therein located between said front surface portion and said pivot mounting and being in axial alignment with an opening provided in said dipper arm, a retaining pin extending through said openings whereby said retaining ring serves solely to retain said scoop in place at said ripping tool front surface.

I i i 

1. An excavator including a dipper arm, a ripping tool pivotally mounted on said dipper arm about a pivot mounting extending transversely with respect thereto, a scoop detachably secured on opposite sides of said pivot mounting and fixedly retained on the front surface of said ripping tool, a portion of said front surface being in supporting engagement with said scoop whereby said scoop is supported by said front surface portion and said pivot mounting for pivotal movement with said ripping tool.
 2. The excavator according to claim 1 wherein said scoop is provided with spaced plates extending rearwardly therefrom to thereby define a channel for the reception of said ripping tool.
 3. The excavator according to claim 1 wherein said pivot mounting comprises a pivot pin, and wherein said pin is surrounded by spaced bushings with said scoop being detachably secured to said bushings.
 4. The excavator according to claim 2 wherein said plates each have an opening therein located between said front surface portion and said pivot mounting and being in axial alignment with an opening provided in said dipper arm, a retaining pin extending through said openings whereby said retaining ring serves solely to retain said scoop in place at said ripping tool front surface. 